oni keisan
Nintendo

Here’s A Look At The 3DS’ Devilish New Take On Brain Age

When first mentioned back in February, Nintendo was said to be working on Oni Tore, or “Demon Training” — a quiz that tested the ability to work on problems from memory. During the Nintendo Direct showcase on Friday, the company offered a look at one of its minigames in action, Oni Keisan, or “Demon Calculation.”

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